polarssl_crypt_and_hash: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/polarssl_crypt_and_hash - from package: libpolarssl-runtime

You may install the required package with command apt-get install {package}

Error in other languages:
polarssl_crypt_and_hash: bevel nie gevind nie
polarssl_crypt_and_hash: comandă negăsită
polarssl_crypt_and_hash: comando não encontrado
polarssl_crypt_and_hash: commande introuvable
polarssl_crypt_and_hash: command not found
polarssl_crypt_and_hash: käsku ei ole
polarssl_crypt_and_hash: không tìm thấy lệnh
polarssl_crypt_and_hash: komanda nerasta
polarssl_crypt_and_hash: Kommando nicht gefunden.
polarssl_crypt_and_hash: kommandot finns inte
polarssl_crypt_and_hash: komut yok
polarssl_crypt_and_hash: nie znaleziono polecenia
polarssl_crypt_and_hash: níor aimsíodh an t-ordú
polarssl_crypt_and_hash: no se encontró la orden
polarssl_crypt_and_hash: no s'ha trobat l'ordre
polarssl_crypt_and_hash: opdracht niet gevonden
polarssl_crypt_and_hash: parancs nem található
polarssl_crypt_and_hash: perintah tidak ditemukan
polarssl_crypt_and_hash: príkaz nenájdený
polarssl_crypt_and_hash: příkaz nenalezen
polarssl_crypt_and_hash: команда не найдена
polarssl_crypt_and_hash: командата не е открита
polarssl_crypt_and_hash: 命令找不到
polarssl_crypt_and_hash: コマンドが見つかりません